Club 80-90 Forums

Can afford to buy both gauges to monitor engine.
Need to get one or t'other.

(also, are dipstick oil temp gauges and good ? Well I guess they must be better than guessing))

Pressure, as will drop off as temp increases anyway...

When you get used to seeing it drop at given rpm, as oil temp builds up (and hopefully stabilises) you will know when the oil is getting hotter than normal, as pressure will be less than normal

Not say an oil temp gauge isn't v. useful, it is

Just bear in mind it's not just oil pressuer that drops as oil temp goes up, but ultimately above say 120C the oil starts to degrade much more quickly and above 130C rapidly!